Elevator-door-operating equipment



Jmn. l0, 1923.

- W2 MCGE ELEVATOR Doon OPERATING EQUIPMENT Filed (mt. 23. 19

Jan. 10, 1928. 1,655,732

o. P. MGGEE ELEVATOR DOOR OPERATING EQUIPMENT Filed 001',- 23. 1926 '7 {sh-SEEE 2 7% o O gz 4e/ 5g 50 i? 7 (g1/tumulto@ Jan. O, 19?'8 O. P. MCGEE ELEvE'roE noon OPERATING EQUIPMENT Filed Oct. 23, 1926 7 Sheets-Silea?,` 3

wi,.----,.----:-IL VEL Jan.1o,192s. 1,655,732

O. P. MCGEE ELEVATOR DOOR OPERATING EQUIPMENT Filed Oct. 23. 1926 '7 Sheets-Sheet 4 Jan. 10, 1928.

O. P. MCGEE ELEVATOR DOOR OPERATING EQUIPMENT Filed Oct. 23. 1926 7 SheetsSheet 5 Jan. 1o, 192s. l 1,655,732 o. P. MCGEE ELEVATOR DOOR OPERATING EQUIPMENT Filed Oct.. 25, 1926 7 Sheets-Sheet 6 Jan. 10, 1928.

o. P. MCVGEE ELEVATOB/ DOOR OPERATING EQUIPMENT Filed Oct. 2:5, 1926 '7 Sheets-Sheet 7 @Honra/4 Patented am. 1o, 192e.

,. UNITED STATES 1,655,732 PATENT OFFICE.

OSCAR P. MQGEE, OF DALLAS, TEXAS, ASSIGNOIR OF ONE-HALF TO WILLIAM A..

SEDWICK, OF IDALLS, TEXAS.

iiLnvArroB-noon-ornnnrme murmurer.

Application led October 23, 1926. Serial No. 143,591.

This invention relates to lnew and useful .improvements in elevator door operating equipments.

The object of the invention is to provide o certain improvements in and additions to the apparatuses illustrated in my Letters Patent No. 1,568,461, issued January 5,1926, and my co-pending application led February d, 1926, Serial No. 85,875.

AV particular object of the invention is to "produce van apparatus which will be substantially n oiseless in its operation and whereby the door switches of my co-pending application will be eliminated.

An important object of the invention is to simplify the construction as Well as to refine it, whereby the apparatus will operate more eliciently and the maintenance will be reduced.

A further object of the. invention is to lil provide air cushions or checks operated by the carriage at the ends of its stroke, Wherehy the opening and closing of the door is inode substantially noiseless and the parts are saved from undue vibration incidental to an ahrunt stop.

Another object of the invention is to pro-- vide, in conjunction with the door en aging latch, an auxiliary closing means, w ereby to a tull closing of the door is assured in` addition to the travel oi the carriage.

.l still lui-ther object oi the invention is to improve the controlling switches, whereby.

more positive contacts will loe'had.

itnother important ohiect oi the invention is `the provision oit a master switch in combination with a cutont switch, tlius pro viding a normally open door-operating cir1 cuit which can only he closed vv.` en the iioor ol the elevator car is within a predeter-l mined distance oit the ldoor landings".

/tntlier object oit the invention to provide a lsubstantially noiseless suspension for the motor and to connect the same "with the operatingcliain by a jointed shalt or other suitable connections, ivl'ierehy the motor may be mounted on a remote part oi the car, tl'ius melting' ijor more quiet operation..

.t construction designed to carry out 'the invention will be hereinatter described, to getlier with other tentures ot the invention..

'lfhe invention will he more readily i id stood 'trom a reading ol the u iication and by relerence to .i

(ill

ing drawings, in which an example of the invention is shown and wherein:

Fig. 1 is an elevation of a door operating apparatus constructed in accordance with my invention, the motor being omitted,

Fig. 2 is a yplan viewof the saine,

Fig. 3 is an enlarged elevation of the carriage and component parts, l

Fig. 4 is an end elevation of the same, the track and angle bar being in section,

Fig. 5 is a plan View of the same,

Fig. 6 is a rear elevation of the same,

Fig. 7 is a side elevation of the motor and its hanger, y

Fig. 8 is an end elevation of the same,

Fig. 9 is a plan view of the door latch and keeper,

Fig. 1Q is an elevation of the same,

Fi 11 is a cross-sectional view talien on the line 11h11 of Fig. 9,

Fig. 12 is a cross-sectional view taken on the line 12--12 of Fig. 9,

Fig. 13 is a view of the door reversing" switch partially in section and partially ir elevation,

p Fig. 14 is an end View of thesame,

Fig. l5 is a View of the door opening and ,car circuit switch partially in elevation and partially in section,

Fig. lo is an end view of the same,

Fig. 17 is a view of the master switch and the cutout switch, portions being sliovrn in elevation and portions in section,

Fig. ld is a similar vieiv at right angles, Fig". 19 is a cross-sectional view on the line l9-19 oi ln,

Q0 is a detail of tlie switch arm lever mechanism,

Fig. al is a diagrammatical vien showing the electrical circuit,

22 is an end elevation ol the appara tus shown in l, and

Fig. titi is a sectional vienI oit the friction ciutch.

ln tlie drawings the numeral lll designates a longitudinal tracli, which l preter to malte ci tihre or some other noise reducing material. tin its rear side the tracli is roi it'orced by a. longitudinal 'l' har il. made metal, portions oit the traclt beingV capot.. abccfe` below said bai'. lllic tr c suitably supported by arms ltd enteric ,D trom standards lil at each end ol the api-- patatas as shown in ltigs. ft, fl and "lhe standards are suitably iiwiiied on the titl liti

lili

'root 14 out the elevator car. A bracket 15 secured to one of the standards supports a sprocket 16, while a. bracket 17 mounted on the other standard 12 supports a drive shaft 18 on which a sprocket 19 is fastened. A sprocket chain 20 is supported by the sprockets.

A carria e 21 is connected to .the upper run of the c ain and is supported by flanged rollers 22 engaging-the upper and lower edges oi the track 10, as is best shown in Figs. 3, 4 and 6. ln order to prevent injury to the driving parts in case the carriage should hang, the sprocket 19 is connected to the shaft 18 by a friction clutch 23 of suitable construction, as is shown in Fig. 23.

At one end the carriage has an upright shoe win 24 integral therewith. 0n the back o t e plate of the carriage I provide 'upper and lower slide rails 25 engaging in the hangers 26 of a slide 27. This slide carries a complementary show wing 28 formed integral therewith, as is shown in Figs. 3. 4 and 5. The wing 28 is slidable toward ailid from the wing 24 to open and close the s oe.

For actuating the slide l provide a crank shaft 29 journaled in the carriage and extending transversely therethrough, as well as extending through a slot 30 in the slide. A crank arm 31 fastened on the Jfront end of the shaft contiguous to the face of the slide is pivoted to one end of a link 32 and has its opposite end journaled on a stud 33 mounted on the slide. By rocking the crank shaft, the arm 31 is swung up (dotted lines Fi 3) and the link thus pulls the slide 27 an opens the shoe. The crank shaft 29 is actuated by a bell crank lever 34 secured to its rear end and having arms 35 and 36 for adjustment into the path of a pin 37 mountyed on the rear of the track'lO, as is best shown in Figs. 4 and 6.

A coiled spring 38 has one end attached -to a, stud 39 on the lever 34 midway between the arms thereof, while the lower end of the spring is attached to a bracket 40 mounted on the carriage. When the lever is swung the stud 39 will be carried to alternate sides of the shaft 29, thus holding the lever in its adjusted position.

It is necessary to open and close the shoe because of its engagement with the door latches, one of which, 41, is shown in Figs. 9 to 12, inclusive. Each latch is right-angular in plan and has a bill 42 engaging; with a bevel-ended keeper 43 adjustably held in a socket 44 by a set screw 45. An angular bracket 46 is secured to the top of the floor landing door 47. The latch includes an outwardly extending arm 48 which is mounted to swing in'a channel arm 49 fastened to the bracket 46. The latch 41 is pivoted to the inner end of the arm 49 on a bolt 50. A Stud 51 on the inner end of the lever carries a set screw 52 which engages the inner end oi the arm 49 and limits the outward swing o the arm 48, as is shown in Figs. 9 and [u fiat spring 53 interposed between the arms 48 and 49 tends to swing the latch.

riihe socket 44 is mounted on the end of a bracket 54 secured to the wall of the elevator shaft. This bracket, as is shown in Figs. 9 and 11, has an outwardly extending arm 55 on which a. small roller 56 is journaled. A. lever 57 is pivoted on the bolt 50 on top of the arm 49 and has a 'fork or yoke 58 engaging the roller 56. A coiled spring 59 has one end pivoted to a stud 60 on the arm. 49, while its opposite end is ivoted to a stud 61 on the lever 57 locate between the ends of the latter. The lever 57 has a lug 62 adapted to engage a pin 63 to limit the swing of the lever in one direction.

The function of the lever 57 is 'to assist in closing the door. W hen the door is open and it approaches its closing position, the lever is in the position shown in dotted lines in Fig. 9, the stud 61 having been swung to the right oi the pivot 50 and the lugr 62 engaged with the pin 63 when the door was opened. As the door approaches its closing position, the yoke 58 is caused to straddle the roller 56 and as the bill 42 rides the bevel of the keeper 43, the lever 57 is swung to the left. When the stud 61 passes the medial line of the bolt 50 and the stud 60, the spring 69 which has been placed under tension exerts a pull on the lever, thus causing it to rock on the roller 56 and torce the latch bill 42 over the end of the keeper 43, whereby the door is fully closed.

Normally the wings 24 and 28 of the carriage are spread apart, as is shown in dotted lines in Fig. 3, and the carriage is positioned on the track 10 so that as the elevator car travels up and down the shaft, the arms 48 and 49 pass between said wings but do not contact therewith. The wings are long enough to cause the arms to be positioned there-between when the car is stopped within the proper distance of the door landing for opening the door.

Upon the initial movement of the carriage 21, the wing 24 engages the arm 48 and swings it into the arm 49, whereby the latch 41 is swung and the bill 42 is carried out of the path of the keeper 43, thereby releasing the door. Upon further movement of the carriage motion is contributed to the arm 49 and the opening movement oi the door is started. The arm 36 of the bell crank levei` 34 is in the path of the in 37, which is located so as to be engaged by said arm upon the initial movement of the door, whereby the lever 34 is swung and the crank shaft 29 is rocked. Referring again to Fig. 3, it will be seen that when the shaft 29 is rocked the arm 31 and link 32 will be actuated to move the slide 2T, thus carrying the wing 28 into llU electric motor 67 (Figs. 7 and 8), which Ino-l tor is rigidly attached to the said device, whereby these parts may be suspended as a unit. Brackets 68 are provided on the motor and on the device66. Bolts 69 suspended from hangers 70 pass through these brackets which are sustained between coiled springs 71 and 72 suitably 4confined on said bolts.

By this means the motor and speed reduction device are resiliently suspended and vibration and noise are thus absorbed. Suitable rubber or felt washers may be used in connection with the springs-or any other means employed to reduce the noise. The particu lar suspension means forms no part of this invention, as the motor may be suspended in any suitable Way so long as provision is made for reducing the noise and vibration.

The standards 12 have vertical extensions 78 upon which is mounted an angle bar 74 above they chain 20, as is shown in Figs. 1, 2, 8, 4 and Q2. To the rear side of this bar I secure a pair of air-check or cushioning cylinders 'i5 of the usual construction, each having a plunger 76. These lun ers are directed towards each other an eac is fas tened to a carrier "77, as is best shown inf toward one of the standards 12 and is snpported in a guide 81 mounted on the bar 74. 0n the end ot' each rod is a guide lip 82cm gaging over the flange of the bar 74 and a depending lug 88 having a button 811 on its rear side and a button 85 on its forward side, as is best shown in Fig. 8. On top of the carriage 21 is a small standard 85 having a lplunger 86 mounted to slide therethrough. Coiled springs 87 are mounted'on the plunger on each side of the standard and are confined by heads 88 on the ends of said plunger.

It will be seen that when the carriage 2l approaches either end of its stroke one of the heads 88 will engage the button 85 of one of the lugs 83, thus moving the rod rearwardly and through the agency of the carrier 7 depressing the plunger 76 so as to cushion the same in the cylinder 75. This checks the movement of the door and cushions the final movement, thus eliminating noise and shock.

In order to return the carrier 77 to its normal position upon the return stroke of the carriage 21, I provide' on said carriage on eacli side of the spring plunger a pair of spring dogs 89, each having a laterally e x tending pin 90. By observing Eig. 3 1t will be seen that when the carriage is moved to the left, the left handI dog 89 will ride under the lug 83 and catch under the button 84.

As long as the plunger head contacts with the button the dog will remain under the button 84. Upon the return stroke the pinv 90 will engage a beveled deector 91 which will depress the dog 89 on the left hand side (Fig. 3) and as the carriage continues lto move to theriglit, the lug 83 will remain stationary and the plunger will be carried on by the carriage. This operation will be repeated at the opposite end of the stroke.

On the rear upper portion of the carriage I mount a pin 92, as is shown in Figs. fl, 5 and 6. On the angle bar 74 I inount a switch box 93 (Figs. 1, 2, 13 and 14). In this box is secured an insulating base plate 94 of fibre or other suitable material on which a con-I tact 95 is secured. At the opposite cud ot the base' another contact 96 is mounted. As is indicated from Fig. 16, each Contact comprises a pair of spaced poles across which the circuit may be closed. On a transverse rock shaft 97 a switch bar 98 is fulcruined. The bar is slottedto receive a pin'99 located between cross-pins 100 in the slotted portion of said bar. The pin 99 will engage one ot' the cross-pins when the shaft 97 is rocked and thus swing the bar down. This arrange nient compensates wear and works in conjunction with swinging contact caps 101 carried by the ends of the bar and adapted to alternately engage the poles ot' the contacts 95 and 96 to bridge the circuits.

For swinging the bar 98 kI mount a bell crank lever comprising arms 109; and 106 on the shaft 97 outside oi the box. These arms are spaced apart and a coiled spring 101 has its lower end pivoted on a stud 104i midway between said arms. The upper end of the spring is pivotally suspended from a bracket 105 on top of the box. The lever is fastened on the shaft so that when the cap 101 is iii engagement with the cont-act 95 the arin 108 will depend in the path of the pin 92 and the stud 104 will be to the left oi the pivot of the lever. as is shown in Fig. 15. The spring exerting an upward pull will hold the parts in this position until they are reversed by the swinging of the lever. whereby the other contact 101 is engaged with the contact 96 and the arm 102 swung into the path of the pin 92. The

vpoles of the contact 96 are connected with the car circuit and the polesl95 are connected with the door operating circuit.

lill

it the other end ot the bar 74 1 mount a switch box 106 having an insulating base 107 on which is mounted a contact 108 comprising two poles and illustrated in Figs. 13 and 1l. A rock shaft 109 is mounted in the box and a switch bar 110 is mounted thereon, the same as the switch bar 98. 'Ehe switch bar carries a single contact cap 111 hinged thereon and adapted to engage the contact 108, which latter is connected with the reversing lields ot the door operating motor 67.

A bell crank lever including arms 112 and 113 is fastened on the shat't outside of the box and has a stud 1141 midway between the arms to which the lower end ot a coiled spring 115 is pivoted. r.The upper end of the spring is pivotally suspended from a bracket 116 mounted on top ot' the box 106. When the arm 112 is engaged by the pin 92 the shaft 109 is rocked to bring the cap 111 into engagement with the contact 108, thus closing the circuit, but when the arm 113 is engaged and swung by the pin the bar 110 will be raised as is shown in Fig. 13 and the circuit opened. r1`he spring 115 will hold the lever arms in their adjusted positions.

1n Fig. 21 l have shown a circuit diagram which includes the motor 67, the switch box 93 and the switch box 106. Main circuit wires A lead from the poles of the contact 96 to the elevator car operating motor (not shown) and constitute the power circuit. ln order to control the operation of the door circuit it is necessary to provide a master-'switch and a. cutout switch, which are shown in Figs. 17, 18, 19 and 20.

rllhe cutoutl switch comprises a box 117 mounted on one of the extensions 73 at the,

end of the bar 7 4. This box has an insulatling base 118 on which a contact 119, including spaced poles, is mounted A crank shaft 120 is mounted in ears 121 on the outside of this box and has a crank arm 122 pivoted to the upper end of a pitman 123 whereby it is operated. An arm 121 is secured at its upper end on the shaft 120 and has an ex tension 124 projecting into the box 117. A switch bar 125 is pivoted on the end of this extension and carries a swinging cap 126 at its upper end adapted to engage the contact 119. A bell crank lever 127 is pivoted on the shaft 120 and swings between lugs 128 at the lower end of the arm 124. A wire spring 129 having its upper end carried on the shaft 120 engages the lower end of the bell crank lever 127 and normally holds it against the outer lug 128. The shaft 120 is under the inuence of a wire spring 130 and the arm 124 is swung against the tension of said spring.

The lower end of the bell crank lever 127 is curved outwardlyy and forked for receiv ing a roller 131. Adjacent each floor landing is a shoe 132 and normally the roller with the shoe, as is shown in dotted lines in Fig. 17. TWhen the roller 131 engages the slice, the lever 127 is swung relatively o1' the arm 1211. ik spring pressed plunger 133 in the upper end of the lever 'and within the, box normally engages the bar 125 below its pivot point, thus holding the cap 126 away from the contact 119. but when the lever is depressed as above described the point of the plunger rides along the bar 125 to a point above its center thus swinging the bar, causing the cap 126 to engage the contact 119 and close the circuit.

At a suitable place in the car l: mount the box 13@ of the master switch. This box includes an insulating base 135 having a series of contacts 136 on one side and a similar series 137 on the other side. lit each end of the base l provide brackets 138 to which yoke members 138 and 138b are pivoted. A yoke bar 139 is fastened to the yoke members. These members with the yoke bar are held in a central and neutral position by spring wires 140, as is shown in Fig. 18. A detent 141 mounted within the switch box extends through a slot 142 and has a handle 143. rEhe inner end of this detent has swiveled connection with a bell crank lever 14apivoted in the box and extending through a slot 145 in the base and back of the box. The

outer end of this lever is pivoted to the l lower end ot the pitman 123. The slot 111-2 has a guide 146 and the detent has a depending lug 147 for engaging this guide which limits the inward movement of the detentnnd sustains it as it is swung to either side. W'hen the detent is pushed in and swung to one side, the lever 144 is operated to pull down the pitman 123.

The yoke 139 carries a. plurality ot spring plunger contacts 148 adapted to engage with the contacts 136 or 137 when the bar is swung. These contacts are connected in common with a terminal 1119 in the box 134-. The contacts 136 are engaged when the detent is swung in one direction and the contacts 137 are engaged when the detent is swung in the opposite direction. A signal lamp is mounted in the upper end of the box 134 and illuminates a lens 151 in th top of said box.

Referring again to Fig. 21, an electric circuit supply wire B leads to one of the poles of the contact 119 of the cutout switch while a wire C leads from the other pole of said contact to the terminal 149 of the master switch. From this it will be seen that until the bell crank lever is operated, no current can pass to the master switch or the parts connected therewith. A circuit wire D leads from the wire C to the socket of the lamp 150 and a return wire Dx leads from `said Gto one ofthe poles ofthe contact 108. The

lamp to the first contact 137". A wire E leads from this contact to one of the poles ,of the contact 95 of the reversing switch. Another wire E leads from the other pole of said contact and forms the other side of the circuit, including the wire B. A branch wire F leads from the wire E to one of the poles of the contact 108 of the opening switch, while wire G leads from the other pole of said contact to the first contact 136. )Vires H, I, J and K '.lead from the remaining contact-s 137 to the motor 67. The wires I and J are connected with the starting elements of the motor while the wires H and K are connected with the operating fields. The contact 137 of the wire K is bridged with the lower contact 136 by a wire M, while a wire N bridges the contacts 136a and 137B. Crossed wires O bridge the contacts 137 connected with the wires I and J with the opposite contacts 136 for reversing the motor.

The operation is as follows:

The carriage 21 is normally at the righthand end of thel apparatus, reference being had to Figs. 1 and 2. Stop brackets 152 are provided at each end of the track to limit 4the travel of the carriage and said carriage willbe in engagement with the bracket at the right-hand end when the device is not being operated. The switch arms 103 Fi 15, and 112 Fig. 13, will be positioned as sown and in the path of the pin 92, Figs. 4, 5 and 6.

When it is desired to open the door the operator grasps the handle 143 and swings `the detent 141 to the left (Figs. 17 and 21). This causes the bell crank lever 144 tobe 0perated, whereby thev pitman 123 is pulled downward and the arm 124 swung outward ly, thussitioning the roller 131 in the path of the elige 132. The Swingin of the arm and lever outwardl will not ave any effect on the switch ar 125 exce t to lower it as is shown in dotted 'lines 1n Fig. 17. When the roller rides'onto the shoe 132, the lever 127 will be swung toward the switch box 117, as is shown in dotted lines in Fig.

17', whereby the lunger 133 will move up the rear edge of the bar 125 above the 4 ivot point of the latter, thus swinging sai bar and causing the cap 126 to engage the poles of the contact 119. The door operating circuit, which is normally open, is thus closed from the wire B through said contact and over wire C to the terminal 149 which is connected with the bracket 138 and the yoke member 138, The yoke member 138' being enga ed with the contacts 137 of the wires J an K provides for the passage of the current to the motor 67 while the yoke member 138h being connected with the wires H and I.

rovide a return passage from said motor. From the member 138b circuit connection is made through the top contact 137", wire N tothe top contact 136, and thence over wire cap 111 being in engagement with said contact, the current w11] pass from the other pole over wire F to the wire E', thus completing the circuit.

The motor 67 thus being started will impart motion to -the shaft 64 through the speed reduction device 66, whereby the shaft 64 will rotate the shaft 18 and the sprocket 19, thus causing the chain 20 and the carriage 21 to travel. When the elevator car is stopped, preparatory to opening the door, the arms' 48 and 49 will stand between the shoes 24 and 28, the shoe 132 being located at such a point to bring about this relation. Upon the initial movement of the carriage the pin 37 (Fi 6) will be engaged by the arm 36 of the ell crank lever 34, whereby said lever will be swung to rock the shaft 29. With reference to Fi ure 3,.the shaft will be rocked in a cloc wise direction thus swinging the arm 31 downwardly and by means of the link 32 movin the slide 27, whereby the wing 28 is carried toward the win 24 as is indicated in full lines in Fig. 3.

T is operation will cause the arm 48 to be pressed into the arm 49 against the tension of the spring 53, whereby the bill 42 of the latch 41 will be swung from the keeper 43, thus unlocking the door 47. As the carriage continues to move to'the left (Figs. 1, 2 and 9) the lever 57 is swung about its pivot 50 until the lug 62 engages the pin 63 and the stud 61 is swung to the right of said ivot. This will bring the lever to the position shown in dotted lines in Fig. 9, whereby 4its the roller 5 Also upon the initial movement ofthe carriage, the pin 92 (Figs. 4, 5 and 6) will engage the arm 102 (Figs. 15 and 16) and swing the bar 98 whereby the circuit connection with the contact 96 will be broken and circuit connection made with the contact 95.. This will open the car circuit `so that the car can not be moved while the door is open. The closing of the circuit across the. poles o1 the contact 95 will not have any eect until the master switch is operated to engage the contacts 136 and reverse the motor 67.

The carriage 21 continues to move to the left and open the door. When the door approaches the end of its opening stroke the operator swings the knob 143 to the center o the Kbox to bring the bar 139 and its com ponent parte to a neutral position. This will swing t e lever 127 and open the motor cir cuit. l

As the carriage approaches the end of its openin stroke, the left-hand dog 89 (Figs. 1 and will ride under the lug 83 and catch under t e button 84. The left-hand head 88 of the plun er 86 will then engage the but ton 85 and t is engagement will be cushioned by the spring 86. As the carriage continues yoke 58 will be free to slide from i to move the lug 83 will be carried to the left,

thus sliding the rod 80 and pulling the lefthand carrier 7 a (Fig. 2) to the left, whereby the plunger 76 is moved into the cylinder and the movement of the carriage thus cushioned or checked. lBy the time the carriage strikes the left-hand stop 152, it will practically have completed its travel due 'to the checking action and the cutting ed of the motor circuit. Consequently, the door will be brought to a stop quitely and all noise will practically be eliminated.

las the carriage approaches the end of its opening stroke, the pin 92 will engage the arm 113 of the switch box 106 and swing the shaft 109, whereby the switch bar 110 will be swung to position shown in Fig. 13. This will break the circuit across the poles of the contact 108 and stop the motor 67 if the operator should fail to move the bar 139 to a lneutral osition.

W en it is desired to close the door, the handle 143 will be swung to the right (lligs. 17 and 21). This will cause the contacts 148 to engage the contacts 136 and 136B. Owing to the'crossed wires O the wire J will be connected with the contact 137 engaged with the yoke member 138a instead of the wire J and this will Areverse the motor because the current wi-ll ow from' the wire C over the wire ll instead of over the wire J. The return from the wire J will be carried by one of the wires O' to the contact 136, which is engaged by the yoke member 138b and the circuit will be completed` over the wires N and E, contactf95 and wire E. y

When the carriage starts on its closing stroke, the in 92' will engage the arm 112 and swing t e switch bar 110 to engage the cap 111 with the contact 108, thus restoring the .circuit which was opened at the end of theopening stroke. The left-hand dog 89 (Fig. 3) still being in engagement with the lug 83 will move the said lug and the rod 80 to the right, thus pulling the plunger 76 from the cylinder 75. By the time the plunger has been pulled to its outward limit, the pin 90 of said dog will ride under the defleetor 91, whereby the dog will be disengaged from the lug 83 and further movement of the rod 80 of the left-hand check prevented.

As the carriage approaches the end of its closing` stroke the right-hand dog 89 (Figs. 1 and 3) will ride under the lug 83 of the right-'hand check whereby the head 88 on the right-hand end of the plunger 86 will engage said lug, which action will be cushioned the spring 87. This will cushion the e osing movement of the door as will be obvious.

As the carriage approaches the end of its closing stroke the pin 92 will engage the arm '103 (Figs. 1,15 and 16) and swing the switch bar 98, whereby the circuit across the poles ,escasa of the contact 95 will be broken and the car circuit across the poles of the contact 9G will be closed. At the same time the arm 35 (Fig. 6) of the lever 3K1 will engage the pin 37 whereby the shaft 29 will be rocked to operate the slide 27 and spread the wings 21 and 28.

The spreading of the wings of the slice will permit the spring 53 to swing the latch 41 so that the bill d2 (Fig. 9) may ride over the beveled end of the keeper Zi3 and thus latch the door. As the door approaches its closing position, the yoke 58 engages the roller 56 and the lever is thus ulcrunied on the roller and swung as the door moves toward the end of its closing stroke. iis soon as the stud 61 passes the center of the pivot 50 the spring 59 will exert a pull on the lever and thus continue to swing said lever whereby the door will be impelled to a fully closed position, even though it has lost momentum by the stopping of the motor 67.

When the door is closed, or just previous to its closing, the operator swings the bar 139 to a neutral position, thus opening all circuits through tlie master switch. This also swings the arm 121l and the lever 127 to their normal position, whereby the plunger 133 swings the bar 125 and breaks the circuit by moving the cap 126 from the contact 119.

What l claim, is:

1. ln an elevator door operating apparatus, means located at the door for opening and closing the same, electrically operated means carried by the car and located to engage the door actuating meansat the iioor landing only, the electrical circuit of the operating means being normally open, means for closing said circuit when the operating means engages the door actuating means, and a cushion device engaged by the electrically operated means carried by the car.

2. In an elevator door operating apparatus, means located at the door for opening and closing the same, electrically operated means carried by the car and located to engage the door actuating means at the ioor landing only, the electrical circuit of the operating means being normally open, means -for closing said circuit when the operating means engages the door actuating means, means actuated by the operating means for breaking the power circuit to the car when the doors are opened, and a cushion device engaged by the electrically operated means carried by the car.

3. In an elevator door operating apparatus, means located on the iioor landing door for opening and closingl the same, electrically operated means carried by the car and located to engage the door actuatin means at the floor landing only, the electrical circuit of the operating means being normally open, a cut-out switch carried by the car and connected in said circuit, means at each floor for operating said cutout switch, and a master switch for the said electrical circuit including means for setting the cut-out switch for operation.

4. In an elevator door operating apparatus, means located on the 'iloor landing door for opening and closing the same', electrically operated means carried by the car and located to engage the door actuatlng means at the floor landing only, the electri-` cal circuit of the door operating means being normally open, a` normally open cut-out switch carried by the car 'and connected in said circuit, means at each floor for o rating said cut-out switch, a master switc for the said electrical circuit including means for setting the cut-out switch for operation. by said door operatin means, a circuit controlling switch carrie by the car and normally closing the car power circuit, and means set to operate by the door operating means upon its initial movement to engage the controlling switch operating means for actuating said controlling switch to open the power circuit.

5. In an elevator door operating apparatus, means located on the floor landlng door for openin and closingthe same, electrically operated means carried` by the car and located to engage the door actuating means at the floor landing only, the electrical lill circuit of the door operating means being normally open, a normally open cut-out switch carried by the carl and connected in said circuit, means at each floor for operating said cut-out switch, a master switch for the said electrical circuit including means for setting the output switch for operation. by said floor operatin means, a circuitcontrolling switch carried by the car and nor mally closing the car ower circuit, means set to operate by the `oor operatingmeans upon its initial movement to enga e the controlling switch operating means or actuating said controlling switch to open the. power circuit, and a'm'otor circuit contact carried by said contrclling switch and closed when said switch isioperated to break said power circuit, whereby said operatin circuit of the door operating means is close through said switch.

6. In an elevator door operating apparatus, means on the floor landing door for opening and closing the same, a traveling carriage mounted on the car and having a shoe for engaging saiddoor opening and closing means, electrically operated means for operating said carriage, a pair of cushions, meansfor operating said cushions en gaged by the carriage at each end of its travel, and means on the carriage forv relstoring said cushion operating means to its normal position.

7. In an elevator door operating ap aratus, a door actuating member mova ly Va shoe for actuating mounted on the elevator car, means for operating said means, a door latch on each floor landing door and having an actuating arm for engagement by the actuating member, a door closing lever carried by t-he latch, a relatively stationary fulcrum engaged by the said lever, and means for operating said lever. l

8. As a sub-combination lin an elevator door operating apparatus, a floor landing door latch having an actuating arn1,.a relatively stationary Aarm carried by the door adjacent the latch arm, said arms being engaged by door actuating -means carried on the elevator car, a fulcrum on the wall of the' elevator shaft,a lever pivoted on the latch and having a yoke for engaging the fulcrum, and a spring mea-ns attached to the latch and lever on opposite sides of the pivot -of the lever for swinging said lever on the fulcrum.

9. In an elevator tus, a longitudinal track, a carriage reciproeating on said track and having a door actuating shoe, means for reciprocating said car-l r1age, means for opening and closing said shoe, a pair of air cushion cylinders, a support for said cylinders, operatin members connected with the plungers of sai cylinders, a spring plunger carried by the carriage for engaging one oi' said operating members at each end of its stroke, and means on the carriage for restoring said operating members to their normal positions.

10. In an elevator door operating appara tus, a door openingand closin member, a motor for operating said mem er, anelectrical circuit controlling said motor, acutout switch connected in said circuit, a circuit opening and closing member in said switch, an operating lever for said switch member, said operating member, and means for positioning said lever in the path of said shoe.

. 1l. In an elevator door operating apparatus, a door opening and closin member, a motor for operatin said mem er, an electrical circuit contro ling said motor, a cutout switch connected in `said circuit, .a circuit opening and closing member in said switch, an operating lever for said' switch member, a shoe for actuating said operating member, means for positioning said lever in the path of said shoe, a master switch connected in said motor circuit and including an operatdoor operating apparaing element, and a connection between said means carried by the iioor landing door, a.

track, a carriage mounted to travel on said track, a shoe wing statlonary on sald carnage, a member movable on said carrlage m fteeavea and carrying a shoe wing, a crank shaft mounted in the carriage, a connection between the crank shaft and the movable mem- 1roer, a lever mounted on the crank shaft and having spaced arms, a coiled spring tor hold ingl said lever in position, and means for automatically swinging said lever when the carriage is moved.

13. In van elevator door operating appara tus, a door opening and closin member, a motor or operating said mem er, an electrical circuit controlling said motor, a cutout switch connected in said circuit, a circuit opening and closing member in said cutout switch, a lever mounted on said switch and carrying said circuit opening and closing member, an arrn pivoted on said switch adapted to engage said member, a spring connecting the arm and the lever, a roller carried by the arm, a shoe engaged by the roller, and means for swinging the lever and the arm to position the roller in the path of the shoe.

14. ln an elevator door operating apparatus, a door opening and closinV member, a

motor for operating said mem er, an electrical circuit controlling said' motor, a cutout switch connected in said circuit, a circuit opening and closing member in said cutout switch, a lever mounted on said switch and carrying said circuit opening and closing member, an arm pivoted on said switch adapted to engage said member, a spring connecting the arm and the lever, a roller carried by the arm, a shoe engaged by the roller, a master switch electricallY connected with the cutout switch and inclu ing a mov able actuating member, and an operating connection between the said switch actuating member and the lever tor swinging the latter.

l5. lin an elevator door operating appara.- tus, means on the fioor landing door for opening and closing the same, a travelin carriage mounted on the elevator car an having a vertical shoe for receiving said door operating means, electrically operated means or operating said carriage, a circuit cutout switch connected in the circuit of said electrically operated means, a movable member for operating the cutout switch, and an actuating shoe for said member located in the elevator shaft having an actuating surn face of such length as to be engaged by the switch operating member only while the door openin and closing means is within the shoe of tie travelling carriage.

16. In an elevator door operating apparatus, a longitudinal track, a sprocket wheel. mounted at one end of the track, aV drive shaft at the opposite end of the track, a friction clutch connected to said shaft, a drive sprocket connected with said clutch, an endless chain travelling around and between said sprockets, a carriage slidable on the track and attached to the chain, air cushion cylinders mounted in opposed relation and having plungers, resiliently sustaincdnctuating means carried by the carriage, operatin members connected with the plungers and individually engaged by the actuating means at each end of the stroke of the carriage.

lln testimony whereof li alix my signature.

@SGAR l?. MGGEE. 

